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Title:
OPTICAL INFORMATION RECORDING DEVICE, OPTICAL INFORMATION PLAYBACK DEVICE, OPTICAL INFORMATION RECORDING METHOD AND PLAYBACK POSITION MISALIGNMENT DETECTION METHOD
Document Type and Number:
WIPO Patent Application WO/2015/011744
Kind Code:
A1
Abstract:
When densely recording books upon a recording medium in order to perform high-density recording of a hologram upon the recording medium, it is necessary to precisely position the books at reference light irradiation positions at playback time. In the present invention, an optical information recording device, which records information on an optical information recording medium using holography, is provided with a light source which fires a light beam, a light beam separation unit which separates the light beam into reference light and signal light, and a spatial light modulation unit which superimposes page data upon the signal light. The spatial light modulation unit places a first modulation pattern on first page data recorded at a first area upon the optical information recording medium. The spatial light modulation unit places a second modulation pattern, which includes a modulation pattern in which bit polarity has been reversed with respect to the first modulation pattern, at a predetermined portion of second page data recorded at a second area adjacent to the first area.

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Inventors:
NISHIMURA KOICHIRO (JP)
ISHII TOSHIKI (JP)
IKEDA NAOHITO (JP)
NAKAMURA YUSUKE (JP)
IDE TATSURO (JP)
Application Number:
PCT/JP2013/069729
Publication Date:
January 29, 2015
Filing Date:
July 22, 2013
Export Citation:
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Assignee:
HITACHI CONSUMER ELECTRONICS (JP)
International Classes:
G11B7/0065; G03H1/22; G11B7/085; G11B7/135
Foreign References:
JP2007101811A2007-04-19
JP2008027490A2008-02-07
JP2008197575A2008-08-28
JP2005031395A2005-02-03
JP2012013901A2012-01-19
Other References:
"Hanbetsu Bunsekiho ni yoru Nichika", MIRAIWARE.NET, 28 August 2013 (2013-08-28), Retrieved from the Internet
Attorney, Agent or Firm:
INOUE, Manabu et al. (JP)
Manabu Inoue (JP)
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